I just about understand color-management in the context of a single image file in Photoshop but unclear how it works when creating a multiple component item such as inDesign document.
If I specify the workingSpace for an inDesign document to be proPhotoRgb and I start creating text in the document I assumed they are using the proPhotoRgb profile. But if I then place an external image that uses sRgb profile does that image get converted to proPhotoRgb or left as sRgb.
Then if I export the document to pdf and select Colour Conversion to No Colour Conversion does the pdf comprise of an object with multiple separate color profiles for text and images or not ?
Conversely if I export the document to pdf and select Color Conversion to Convert to Destination Space and pick a CYMK profile is everything text and images converted so the pdf consists of a single profile ?
Side note:There is a curious warning when you select Convert to Destination regarding colours created within the application' I assume if you have a working space set for the document there is no issue.
Comments on Answer Below
If you choose to not convert, the images that were imported in InDesign won't be changed at all. And the elements in your InDesign should keep the InDesign profile/color space.
So that means you can have CMYK and RGB together, they'll remain this way. For the profiles, you'll have the option to not include them or convert to the destination profile. To my knowledge, you'll have one profile in your PDF or none at all
Isn't this a contradiction, i,e that the images arent converted to the Indesign profile, yet you can only have one profile in the PDF. To be clear InDesign is a temporary step for me to be able to create a pdf so its the final pdf (that gets sent to the printer company) that I most concerned about.
Additionally, you can also choose to "convert to destination (preserve numbers)". This will only convert the elements that have a different color space but will keep your original color recipe in your Indesign (eg. swatches) without changing them for example. So that's not a bad option.
I can see from your coloured images that this option appears to be better then the convert to destination option but isnt this just putting off the inevitable. If everything has one colour profile in the final pdf dont we need to convert it, and if we preserve numbers doesnt that mean the numbers (e.g R=123, G=234,B=234) are being kept the same even if converted to a new profile where those colours no longer have the same meaning in the new color space.